The alchemists, who in their own way knew more about the nature of the individuation process than we moderns do, expressed this paradox through the symbol of the uroboros, the snake that eats its own tail.

• 炼金术士，以自己的方式得知的自然个性化进展比我们今天懂得的还多，通过这种标记解释了这种似非而是的论点，蛇咬着自己的尾巴。